Circuit-breaker



P. F. KITTOE.

CIRCUIT BREAKER.

APPLICATION FILED AUG-3, 1920.

Patented May 31, 1921.

F. F. Kittoe INVENTOR' ATTORNEY UNIT D STATES IILIP xrr'ron, .or GALENA, ILLINOIS. l 1

. CIRCUIT-BREAKER.

Specification of Letters Patent.

Application filed August 3, 1920. Serial No. 400,968.

To all whom it may concern:

Be it known that I, PHILIP F. Krr'ron, residing at Galena, in the county of J o Daviess and State of Illinois, have nvented new and useful Improvements in Clrcuit- Breakers, of which the following 1s a speclfication. 1

This invention relates to improvements in circuit breakers and especially to pressure operated circuit breakers designed prlmarily for use in connection with dental vulcanizers.

An object of the present; invention 1s the provision of a circuit breaker whlch will operate to open a circuit at a predeterm1 ned pressure, means being provided to adjust the device to regulate the degree of pressure at which it will operate.

Another object of the invention is the provision of a circuit breaker which is simple in construction and positive in operat on and which may be used in connectlon Wltl'l either air or liquid operated mechanlsms.

\Vith the above and other objects in view, the invention further includes the following novel features and details of construction, to be hereinafter more fully described, illustrated in the accompanying drawings and pointed out in the appended clalms.

In the drawings 0 Figure 1 is an elevation of a c1rcu1t breaker embodying the present invention.

Fig. 2 is a central longitudinal sectional view of the same.

Fig. 3 is a transverse section.

Referring in detail to the drawmgs, wherein like characters of reference denote corresponding parts, the circuit breaker is shown as comprising a cylinder 10 which 1s closed at one end by means of a removable cap 11 and is provided at its other end with a nipple 12 having an opening 13 therefor by means of which the cylinder may be connected to a suitable source of pressure.

Operating .within the cylinder 10 is a piston 14 which isequipped with a packing ring 15 and is provided with a rod 16 which extends through an opening in the cap 11, the rod being bent upon itself as shown at 17 so as to provide an arm which forms a removable contact member 18. The contact member 18 is insulated from the rod 16 proper as shown at 19, while the extremity of the said arm is formed of fiber or other insulating material as shown at 20.

Mounted upon the cylinder '10 is a ring 21 which may be adjusted at any point within the length of the cylinder by means of a set screw 22. The ring 21 is provided with a hollow arm 23 and a transverse opening 24, the latter forming a guide for the movable contact member 18. Located within the hollow arm 23 is a contact point 25 which engages the movable contact member 1.8 and is yieldingly held in such engagement by means of a coiled spring 26. The outer end of the arm 23 is provided with a binding screw 27 for connection with one of the lead wires of an electric circuit.

The movable contact member 18 is connected in the circuit by any preferred means,

Patented May 31, 1 921 I the means shown consisting of a collar 28 which is adjusted upon the contact member 18 by means of a screw 29 which also provides a binding post for connection with the circuit wire.

Located within the cylinder 10 and surtoward one end of the cylinder, in which position the contact point 25 is in engagement with the contact member 18 to complete the circuit. Pressure entering through the passage 13 will move the piston 14: against the ends of the spring and cause the contact point 25 to engage the insulated end 20 of the contact member 18 and interrupt the circuit. The point at which this interruption will occur may be regulated by the position of the ring 21 so that the amount of pressure necessary to interrupt the circuit may be increased or decreased as desired.

The invention is susceptible of various changes in its form, 'prbportions and minor details of construction and the right is herein reserved to make such changes as properly fall within the scope of the appended claims.

Having described the invention, what is claimed is 1. A circuit breaker comprising a cylinder, a spring actuated piston therein, an adjustable contact member carried by the cylinder, a movable contact member carried by the piston and normally contacting with the adjustable contact member, said movable contact member including spaced parallel arms connected at one end and means whereby pressure may be applied to the piston to move the latter against the action of the sprin to separate the contact members.

2. K circuit breaker comprising a cylinder, a spring actuated piston therein, an adjustable contact member carried by the cyl-' inder, a movable contact member carried by the piston and normally contacting with the adjustable contact member, said movable contact member comprising a substantially U shaped rod and means whereby pressure may be applied to the piston to move the latter against the action of the spring to 15 separate the contact members.

In testimony whereof I affix my signature.

PHILIP FREEMAN KITTOE. 

